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Article | Open Access

Design and Fabrication of Slidable Pedicle Screw Frame System for Surgery Therapy of Patients with Spinal Deformity in Growth Period

Zhenglei Wang( ), Jichang Gao, Danbing Jia, Wenjing Zhang, Peng Sun, Qi Qi, Ming gong, Wenxian Fan, Xianyu Wu, Fuquan Zhao
Department of Orthopedics of No. 211 Hospital of the PLA, Harbin 150080, P. R. China
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Abstract

With the aim of preventing iatrogenic shot trunk, stiffness and rotation deformity caused by long-term fixation with usual locked pedicle screw system, a new kind of slidable pedicle screw frame system was designed and fabricated to treat patients with spinal deformity in the growth period. The frame was composed of slidable and locked pedicle screws, cross-links and double rods. The middle part of double rods was fixed with locked pedicle screws and two ends of them were with slidable ones. The spine longitudinal and transverse growth was not limited. 360 patients including 82 congenital scoliosis, 110 idiopathic scoliosis, 60 kyphosis, 44 spinal fractures and 63 spinal tumors or tuberculosis were treated. The average preoperative Cobb’s angle of scoliosis was 66.43°, post-operative one was 22.43°and lost 5° with average 14 months of following-up (6-37 months). The total longitudinal growth of adolescent spinal deformity was 86.4 cm (mean 0.9 cm). In conclusion, slidable pedicle screw frame system is successfully designed and fabricated, also stable and effective to correct the spinal deformities in adolescent growth period. The longitudinal and transverse spine growth of post-operation patients was not limited, and no complications such as stiffness, vertebrae rotation and crank shaft happened for post-operation patients.

Keywords

Spinal deformitySpinal growthSlidable pedicle screw frame system

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Nano Biomedicine and Engineering
Volume 3 Issue 2,
June 2011
Pages 126-129
DOI: 10.5101/nbe.v3i2.p126-129
Cite this article:
Wang Z, Gao J, Jia D, et al. Design and Fabrication of Slidable Pedicle Screw Frame System for Surgery Therapy of Patients with Spinal Deformity in Growth Period. Nano Biomedicine and Engineering, 2011, 3(2): 126-129. https://doi.org/10.5101/nbe.v3i2.p126-129

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Published: 30 June 2011
© 2011 Z. Wang, et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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